The Research On The Preparation Of Hydroxy Iron Oxide And Photocatalytic Degradation Of Antibiotics

The high COD,unstable water quality,a lot of inhibitory substance of antibiotic water have become the big problem of water treatment industry.Photocatalytic technology is a new water treatment technology,and it has the advantages of being efficient,environmental,as well as economical.Using?-Fe OOH and?-FeOOH/GO as the catalyst,the photocatalytic degradation activity of which they to tetracycline was studied.Different concentration of ferric ion of?-FeOOH and?-FeOOH/GO composite materials were prepared by using the method of water bath reflux system.This experiment was carried out photocatalysis and adsorption.The results showed that the photocatalytic activity of?-Fe OOH/GO could be effectively improved by loading GO,the removal rate of tetracycline was over 95%,and the removal rate of COD for tetracycline solution was about 60%,which was different from that of?-FeOOH/GO composite.The adsorption capacity of?-FeOOH/GO was increased by more than 25%compared with that of normal?-FeOOH,and the total adsorption capacity of?-Fe OOH/GO was more than 12mg/g.?-FeOOH/GO optimal dosage was 0.08g,the optimum pH value was 9.Composite materials were used for several times,and still has high photocatalytic removal efficiency of tetracycline.The results of characterization showed that:The crystal structure of the?-FeOOH and?-FeOOH/GO was good;The BET surface area of the?-FeOOH/GO reached133m~2/g,and the total pore volume of the material was 0.26cm~3/g.The BET surface area and total adsorption capacity of the composite increased,and the particle agglomeration on the surface of?-FeOOH/GO was improved.Through the loading,the graphene oxide defect density became higher,which sped up the electronic conduction rate in?-FeOOH/GO,and thereby sped up the photocatalytic rate.